Underground Gate Valve
Product Overview
As an ISO 9001 certified manufacturer, our Underground Gate Valve is engineered for buried water distribution networks, municipal pipelines, fire protection systems, and irrigation projects.
Featuring a resilient seated wedge and an epoxy-coated ductile iron body, it provides reliable shut-off performance, high corrosion resistance, and an extended service life in direct-burial installations.
Available in multiple sizes and pressure ratings, all valves can be supplied in strict accordance with EN, BS, and AWWA standards.
Technical Specifications
| Feature | Specification |
| Size Range | DN50 - DN300 (2" - 12") |
| Pressure Rating | PN10, PN16, PN25 / Class 150 |
| Body Material | Ductile Iron GGG40/GGG50 |
| Wedge Material | EPDM encapsulated (Drinking water approved), NBR available for sewage applications. |
| Stem Material | Stainless Steel 420 / 304 / 316 (Available upon request) |
| Connection Type | Flanged ends conforming to EN 1092-2, ASME B16.42, or BS standards |
| Application Temp | -10°C to 80°C (14°F to 176°F) |
Core Features
WRAS and CE approved EPDM wedge delivers reliable Class A bubble-tight sealing with reduced operating torque for deep-bury operations.
Full-bore design with a smooth, groove-free bottom prevents sediment accumulation and minimizes pipeline pressure drop.
Heavy-duty internal and external Fusion Bonded Epoxy (FBE) coating, applied at a minimum thickness of 250 microns, isolates the ductile iron from aggressive soil chemistry.
Triple O-ring stem seals prevent external groundwater infiltration and allow for seal replacement under full line pressure.
Ductile iron GGG50 construction complies with EN 1074-2 and AWWA C515 standards to reliably withstand underground structural loads.
Standard Compliance Matrix
| Standard | Body Design | Flange Drilling | Wall Thickness |
| European Standard | EN 1074-1 / -2 | EN 1092-2 (PN10/PN16) | EN 1563 (GGG50) |
| American Standard | AWWA C515 | ASME B16.42 Class 150 | ASTM A536 (65-45-12) |
Accessories & Compatibility
To suit various burial depths, our underground gate valves are fully compatible with standard international pipeline accessories:
Top Connection
Standard square operating cap (stem drive) designed for seamless integration with extension spindles and T-keys.
Interchangeability
Flange dimensions and top flange configurations allow direct connection to major European and American standard valve boxes and actuators.
Available Extensions
Fixed or telescopic extension spindles can be supplied together with the valves upon request.
Typical Applications
Built for harsh underground environments and continuous municipal service, this valve is widely utilized in:
Potable Water Networks
Main transmission lines and district metered areas (DMA).
Fire Protection Systems
Buried ring mains and hydrant supply lines.
Irrigation & Water Treatment
Industrial water supply, agricultural networks, and pump stations.
Testing & Compliance
Every single valve undergoes strict quality inspection before entering the packing line to ensure field reliability:
Hydrostatic Shell Test
1.5 x PN (e.g., 24 Bar for PN16) - Zero structural leakage.
Hydrostatic Seat Test
1.1 x PN (e.g., 17.6 Bar for PN16) - Class A bubble-tight sealing.
Coating Holiday Test
3,000V high-voltage spark test - Zero porosity in the FBE layer.
Documentation
Type 3.1 Material Certificates (EN 10204) and Pressure Test Reports are supplied with every shipment.
FAQ
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